seriously pissed off camera flash question (wired & infra red mixed)

[enginyr]

Does wired sync work with on camera flash? It seems as if my on camera 580ex2 is throwing the sinc wire out of wak.

5d2 hooked up to a strobe thru the sync port on the side of the camera
5d2 hooked up to a strobe thru the synn port on the side of the 580ex2
5d2 " " with the flash off is the only way I could get it to work.

[Austin.Manny]

I'm pretty sure the sync port on the 580exII is for input only, you can't use it to trigger another flash/strobe. :confused:

[enginyr]

thank you austin. It seems as if my strobe has an internal optical sync that just won't turn off even when trigger thru a wire, is the problem.

[CliveyBoy]

As you do not refer to the 550EX and 430EX in your tests, I assume they are not in use at the time and are not part of the configuration.

Camera sync port to off-camera 580EXII sync port should fire the flash, unless the flash is in Master and Manual mode, in which case the port is disabled.

I would expect problems if a 580EXII is placed on-camera, and also has a pc-sync cable from camera to flash - I know of no benefit in the redundant connection. Have you tried that configuration?

Turning the main flash Off is possible only when in Master Mode. It requires a full E-TTL connection to be in use (hot-shoe, Canon extension cable). If it is off, in what way did "it work"?

As Austin.Manny says, the 580EXII sync port is input only, and only when in the right modes. A cable running from a 580EXII port to say, a 550EX will not fire the 550EX.

There is no optical sync capability in the 580EXII. The Canon command/E-TTL system uses an optical carrier, but is not a simple optical trigger. A PC-sync cable can be used in a "hybrid trigger" configuration under very specific settings.

Perhaps a more useful response could be given if you said precisely what configuration you are trying to achieve.